Machine for making paper-box blanks.



, F.P.VAVRA.

MACHINE FOR MAKING PAPER BOX BLANKS.

APPLICATION FILED FEB. 24, 1908. RENEWED AUG 12,1910.

Patented Oct. 11,1910.

INVENTOR- 7 u It WITNESSES: JL.

til

EBANK P. VAVBA, OF CHICAGO, ILLINOIS.

MACHINE FOR MAKING PAPER-BOX BLANKS.

Specification of Letters Patent.

Patented Oct. 11, 1910.

Application filed February 24, 1908, Serial No. 417,398. Renewed August 12, 1910. Serial No. 576,910.

To all it my concern:

Be it known that I, FRANK P. VAVRA, citizen of the United States, residing at "Chicago, in the county of Cook and State of Illinois, have invented certain new and use ful Improvements in Machines for Making Paper-Box Blanks, of which the following is a specification.

My invention relates to apparatus for making paper boxes and refers especially to machines designed for completing the blanks used in constructing boxes of the folding t a 1 the making of blanks for paper boxes two methods are followed for feeding the stock to the machine. In one of these methods a continuous roll of paper or other material is employed, and in the second method the material is furnished to the machine cut into sheets of the-acquired size and these are fed singly to the operating mechanism either by hand or automaticall I prefer the method of feeding the paper 1n sheets by automatic means, although my im-' provements are equally applicable to the feeding from a continuous roll. In the appliances in vogue the forming of the blank 1s a procedure entirely distinct from the' printing operation, each requiring a special apparatus. In my improved devices, however, ]i combine the two operations in one, the cutting, scoring and printing being done simultaneously and by the same set of rollers or dies, thus forming a complete box, or a plurality of boxes at one operation.

The chief objects of the improvements which form the subject matter of this application are to provide a mechanism for printing, scoring and cutting the material for paper boxes at a single operation, to furnish means for holding the necessary dies and plates so that they may be removed bodily from the operating rollers thus permitting others of a difi'erent size or pattern to be quickly substituted therefor, and to supply convenient methods of securing the parts of the dies to said holding means.

@ther objectsof the invention are to provide fastening devices for the dies of such design that duplicate sets may be assembled on opposite sides of the main roller so that the method of feeding from a continuous roll may be employed for the purpose of increas ing the output, and to furnish removable platens for the coacting roller.

i accomplish the above and other importhe surface of the tent objects by the employment of the apparatus illustrated in the-accompanying drawing forming a part of this application, and

in which Figure 1 is a. front elevation of a pair of operating rollers equipped with my improved devices for reducing finished plates suited to the manu acture of folding paper boxes. Fig. 2 is a sectional view on the line 22 of Fig. 1; Fig. 3 is a section taken 7 .with two semicircular shells applied to its face.

Referring to the details of the drawing the numerals 5, 6, indicate a pair of coiipcrating rollers mounted upon journaled in a frame 9, and furnished with mtermeshing gears 10, having the same diameter to insure that the rollers will positively register in their rotary movements. The upper rollers 5 is reduced in diameter except at the ends, which are left full size to form collars 11, arranged to bear against companion roller 6. The roller 5 carries the dies and impression plates which form and print the plates and ,1s termed the main roller, while the lower and coacting roller 6 is auxiliary thereto and performs the oflice of a platen. The dies and knives are not mounted directlyupon the main roller as has heretofore been the practice but are carried upon a removable curved plate or shell 13, semicylindrioal in form, and provided at the ends with flanges 14. The shell 13 is secured to the face of the roller 5 by screws 15, and, as shown in Fig. 3, covers but one half the roller. This is the arrangement when the paper is fed in sheets, a duplicate shell being applied to fill the remaining half of the roller when a continu ous sheet is used, such an application not being shown, since it will be readily understood by any one skilled in the art.

The floor or outer face of theshell 13 is raised above the general surface in some portions as shown at 16, and upon these elevated parts the impression plates or electrotypes 17 are mounted, and secured thereto by screws 18.

Between the plates 17 and wherever required in the design are placed the scoring shafts 7, 8,.

blades 19, held in position by blocks 20 and secured-by screws 21. The scoring blades project slightly above the printing sm fac'e of the impression plates 17, and are re- 5 ceived in corresponding grooves or recesses 22 formed in the opposing surface of the auxiliary roller or platen 6. To facilitate the changing of the design, however, and for other reasons, such as economy in construction and saving in time, I prefer to provide the said roller (3 with a removable plate or platen 23 extending over half the circumference, as in the case 'of the shell 13 applied to the roller 5. I prefer to secure the shell 15 23 in a somewhat different manner from that used for the shell 13 one margin having a radial flange 24 which projects toward the center and is received in a longitudinal groove 25 where it is removably fastened by screws 26, other screws 27 being inserted near the opposite margin. Another curved platen may be applied to the vacant side of I the roller 6 when the roller 5 is completely covered, so as to correspond therewith, the

roller 6 being secured by screws inthe manner shown in Fig. 4:. Along the lines where it is'desired to sever the sheets, cutters or knives are inserted and secured in place by any of the ordinary methods. These knives v are eitherstraight as shown at 28 or curved as indicated at 29, 30, to form the tongues and slits and are adjusted so that they touch the face of the platen -without pressure thereon. v The curved knives 29 which are designed to cut tongues of special form are preferably made in two sections to facilitate shaping. These sections are shown at 31 and 32 in Fig. 4, the line of junction being indicated at a. As an aid in alining and registering the various dies and plates and to further secure the curved knives which are frictionally held, clamping bolts 34 are provided which have threaded engagement with holes in the flanges 14: of the shell orthe blocks 20. The general features of the application of the dies to the curved surfaces are similar to those made use of in rotary blank cutters and printing presses and further details will be unnecessary in this particular. The method of applying the ink by means of the rollers 35 shown in Fig. 3 and the paper feeding means are also well known in the art, and will be readily understood. The arrangement of the devices illustratedin Fig. 1 shows the mechanism adapted to'print'and out two complete blanks from a si le sheet, the parts lying upon either-side o the median line being duplicates. This arrangement may be varied at will according to the dimensions and design of the box to be roduced, and a duplicate shell may be app ied to the roller, as hereinbefore mention so that even a greater number of box plates may be formed during one revolution of the rollers.

In operating the machine the sheets am fed in the ordinary manner between the rollers 5, 6, which are set in operation by means of power applied in any desired manner such application not being shown in the drawing. As the sheet passes between the rollers the action of the blades and knives will differ in no wise from that met with in ordinary machines, and the application of the ink by the rollers 35, and the. impression of the printing plates are the same as observed in the common rotary printing press.

Having thus described my invention what I claim, 1s:-- y

1. In a machine for making paper-box blanks, two coeperating rollers and means for driving same, a sectional shell attached to one of said rollers, a plurality of rint ing plates spaced apart and removably attached to said shell, scorin knives and cutting knives arranged a jacent to said plates, means for removably holding said knives in operative position on said shell,

means for clamping said sectional shell on said roller and a sectional shell removably attached to the other. roller and having grooves to receive the edges of said knives.

2. In a machine for making paper boxes, the combination with a pair of cooperating rollers, end flanges on one of the rollers, and means for operatin the rollers, of a semi-cylindrical flanged s ell applied to the face of the flanged roller, devices consisting of scoring blades, knives and printing plates mounted on said shell, and means for attaching said devices, said means comprising clamping bolts engaging the shell flanges.

3. In a machine for the purpose stated, the combination with a pair of coiiperating rollers, and gearing connectin the rollers, of a shell engaging'the face 0 one of said rollers, and provided with a raised mar and 'a curved plate engaging the ot er roller, and a radial flange pro ecting from said plate and engaging a longitudinal groove in the roller face.

In testimony whereof I aflix my signature in the presence of two witnesses.

"FRANK P. VAVRA. Witnesses:

F. BENJAMIN, M. A. Mmonn. 

